Calls for a “wealth tax” — particularly focused on billionaires — have been gaining renewed attention in Australia, driven by inequality discussions and budget pressures.
In January 2026, the ABC reported on Oxfam’s call for a wealth tax on Australia’s billionaires, including modelling about potential revenue. Separately, Australia’s Parliamentary Budget Office has produced costing work on proposals described as taxing billionaires and “future billionaires”.
What is a wealth tax (in plain English)?
A wealth tax generally taxes net wealth (assets minus liabilities), rather than income. That could include:
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Shares and investment portfolios
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Property holdings
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Private business equity
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Other high-value assets
The details matter enormously: who it applies to, what thresholds are used, how assets are valued, and how liquidity issues are handled (wealth can be “paper wealth”).
Why is it being discussed?
The arguments in favour usually focus on:
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Funding essential services and cost-of-living support
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Reducing inequality
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Broadening the tax base beyond wage earners
Arguments against often focus on:
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Complexity and valuation disputes
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Investment impacts
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Capital flight / tax avoidance risk
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Administrative burden
What should high-net-worth families and business owners do now?
At this stage, it’s a policy debate, not a confirmed change. Practical steps are:
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Ensure your entity structures and asset registers are tidy and up to date
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Maintain clear documentation of ownership, valuations and liabilities
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If you’re in succession planning, treat 2026 as a year to tighten governance and record-keeping
